Chain saw



FIG. 1 is a perspective view of a chain saw;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a rear elevational view thereof.

FIG. 8 is a perspective view of an alternate embodiment of a chainsaw;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a top plan view thereof;

FIG. 13 is a front elevational view therof; and,

FIG. 14 is a rear elevational view thereof.

The broken lines shown in the drawings represent portions of the chain saw that form no part of the claimed design. 

CLAIM We claim the ornamental design for a chain saw, as shown and described. 